TREA

Eiji Umeya

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  • Numazu, JP
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Patents Grantslast 30 patents

  • Information Patent Grant

    Vacuum interrupter
    • Patent number 4,446,346
    • Issue date May 1, 1984
    • Kabushiki Kaisha Meidensha
    • Yutaka Kashimoto
    • H01 - BASIC ELECTRIC ELEMENTS
  • Information Patent Grant

    Vacuum interrupter
    • Patent number 4,408,107
    • Issue date Oct 4, 1983
    • Kabushiki Kaisha Meidensha
    • Shinzo Sakuma
    • H01 - BASIC ELECTRIC ELEMENTS